Improvement in locks



H. stun.

Locks 1 No. 145,370. Patented Dec-9,1873.

Witnesses. Inven r Per Attorneys.

AM PHOIU-llT/IOGRAPH/L' Ca/MX/asM/MA'S PROCKSS) UNITED STATES PATENTQFFIGE.

HERRMANN STEIN, OF NEW YORK, ASSIGNOR TO HIMSELF AND HERMAN DALE, OFBROOKLYN, N. Y.

IMPROVEMENT IN LOCKS.

Specification forming part of Letters Patent N0. 145,370, daled Dccrmber 9, 1873; application filed September 13, 1873.

To all whom it may concern:

Be it known that I, HERRMANN STEIN, of the city, county, and State ofNew York, have invented a new and Improved Look, of which the followingis a specification:

In the accompanying drawing, Figure 1 represents a sectional sideelevation of my improved lock; Fig. 2, a top view of the same; Fig. 3, adetail view of the spring-plate for holding the tumbler in place, andFig. 4 the end view of the key of the lock.

Similar letters of reference indicate corresponding parts.

The object of my invention is to furnish a simple and eflective lock foruse in the different trades, which can cheaply be made, being durableand strong in construction, and not liable to open when tampered with.My -invention consists in a revolving tumbler which acts directly on arecessed bolt, and is retained in opened or closed position by adisk-shaped spring-plate with projecting teats.

In the drawing, A represents the bolt of the lock, which is guided inits forward and return motion, in the usual manner, by a slot in theside face-plate and a lug, a, and slot a at the rear end. The tumbler Bturns in a recess, 11,

of bolt A, which recess is provided with curved sides and a straightconnecting part, as indicated in Fig. 1. The tumbler B passes along oneside and acts on the other side of recess 1), for producing rectilinearmotion of bolt A. Tumbler B is centered with its circular part on avertical pillar, d, which is firmly set into the main plate of the lock.The hollow key 0 is provided with a lug, e, and fits into a circularrecess, 0 of tumbler B, when placed on pillar d, which recess hasdiametrical extensions 0 of the size of lug e, by which the latter takeshold of the tumbler to turn the same. A diskshaped plate, D, rests onsupports f and tumbler B, and is provided with a perforation and shortslotted extensions, corresponding exactly to recesses e e of the tumblerB and pillar d, for admitting the insertion of the key 0 there to. Teatsor projections g are arranged at the under side of plate D, at pointswhich define the limits of forward and backward motion of bolt A, forretaining the tumbler B securely in position till carried past one teat,g, by the action of key 0 on the same. The tumbler B is then turned'andproduces the motion of bolt A till the other teat, g; is reached. Thepressure of tumbler B on teat g lifts that part of plate D which, on thepassage of the tumbler, locks like a strong spring-plate on the same andsecures its position. The small slots or recesses for the key preventthe introduction of wires of sufiicient strength to overcome the strongpressure of plate D on the tumbler, so that the lock cannot easily betampered with, while the direct action of the tumbler 011 the boltprevents the forcing back of the same by HERRMANN STEIN.

Witnesses PAUL GOEPEL, HERMAN DALE.

